H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/17, 325/30
H04B 7/26 (2006.01) H04J 3/06 (2006.01) H04M 11/06 (2006.01) H04B 1/16 (2006.01) H04Q 7/22 (2006.01) H04Q 7/20 (2006.01) H04Q 7/30 (2006.01) H04Q 7/32 (2006.01)
Patent
CA 2172972
A power-conserving time division multiple access (TDMA) radiotelephone system is disclosed in which a cluster of subscriber stations, remote from a base station, employs a common pool of frequency-agile modems each of which digitally synthesizes, on a time slot-by-time slot basis, the different channel-identifying intermediate needed to support communications between several of the subscriber stations and the base station. Power conservation is facilitated inter alia by controlling the assignment of modems to calls, maintaining unassigned modems in a powered-down state and by controlling the number of calls using the same time slot. Delay in assigning a powered-down modem to a call is eliminated by making available to all modems the highest quality synchronization information obtained by any of the active modems.
L'invention concerne un système radiotéléphonique AMRT à économie d'énergie, dans lequel une grappe de stations d'abonnés, éloignée d'une station de base, utilise un pool commun de modems agile en fréquence, chacun de ces modems synthétisant, de façon numérique, sur une base "tranche de temps par tranche de temps", les différentes fréquences intermédiaires identifiant un canal requises pour permettre les communications entre plusieurs stations d'abonnés et la station de base. L'économie d'énergie est facilitée par, entre autres, le contrôle de l'affectation des modems aux appels, le maintien des modems non affectés en veilleuse et le contrôle du nombre d'appels se faisant dans la même tranche de temps. Le retard d'affectation d'un modem en veilleuse à un appel est éliminé du fait que tous les modems disposent des informations de synchronisation de la plus haute qualité obtenues par n'importe lequel des modems actifs.
Cooley David M.
Digiovanni Joseph J.
Johns Eric
Kaewell John D.
Kurtz Scott D.
Interdigital Technology Corporation
Ridout & Maybee Llp
LandOfFree
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